Originally Posted by rgAAFT

it seems most of your points are valid for oneworld . I would suggest booking your US to Asia segment via AA miles (you should be able to go at least once in in biz class without even touching your girlfriend's miles, Also, utilize those US air miles and book itineraries with stopovers (while you still can)
then, transfer your UR miles (MR points maybe also) to BA and utilize their distance based redemption costs to your advantage for inter asia travel on carriers such as Cathay pacific whom often utilize the 777 for example, even on short flights.

the ultimate decision on how to use your miles is up to you, but always remember to keep a stash of reserve miles avaliable in case you find yourself in a bind.

hope that helps